Merge pull request #1690 from peastman/leak

Fixed a memory leak

platforms/cpu/src/CpuPlatform.cpp

@@ -127,6 +127,8 @@ void CpuPlatform::contextDestroyed(ContextImpl& context) const {
     PlatformData* data = contextData[&context];
     delete data;
     contextData.erase(&context);
+    ReferencePlatform::PlatformData* refPlatformData = reinterpret_cast<ReferencePlatform::PlatformData*>(context.getPlatformData());
+    delete refPlatformData;
 }
 
 CpuPlatform::PlatformData& CpuPlatform::getPlatformData(ContextImpl& context) {

platforms/reference/include/ReferencePlatform.h

@@ -56,7 +56,7 @@ public:
     void contextDestroyed(ContextImpl& context) const;
 };
 
-class ReferencePlatform::PlatformData {
+class OPENMM_EXPORT ReferencePlatform::PlatformData {
 public:
     PlatformData(const System& system);
     ~PlatformData();